The Cisco ISE must deny network connection for endpoints that cannot be authenticated using an approved method. This is required for compliance with C2C Step 4.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-242600	SRG-NET-000148-NAC-000620	CSCO-NC-000260	SV-242600r812782_rule	2024-09-10	2

Description
Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Identification failure does not need to result in connection termination or preclude compliance assessment. This is particularly true for unmanaged systems or when the Cisco ISE is performing network discovery.

ℹ️ Check
If DoD is not at C2C Step 4 or higher, this is not a finding. Verify that the authorization policies have either "deny-access" or restricted access on their default authorization policy set. 1. Work Centers >> Network Access >> Policy Sets. 2. Choose ">" on the desired policy set. 3. Expand Authorization Policy. If the default authorization policy within each policy set has "deny-access" or restricted access, this is not a finding.

ℹ️ Check

If DoD is not at C2C Step 4 or higher, this is not a finding. Verify that the authorization policies have either "deny-access" or restricted access on their default authorization policy set. 1. Work Centers >> Network Access >> Policy Sets. 2. Choose ">" on the desired policy set. 3. Expand Authorization Policy. If the default authorization policy within each policy set has "deny-access" or restricted access, this is not a finding.

✔️ Fix
Configure each policy set so that authorization policies have either "deny-access" or restricted access on their default authorization policy set. 1. Work Centers >> Network Access >> Policy Sets. 2. Choose ">" on the desired policy set. 3. Expand Authorization Policy. On the default authorization rule, select "Deny-Access" or a result that is configured for a restricted VLAN, ACL, SGT, or any combination of these used to restrict the access.

✔️ Fix

Configure each policy set so that authorization policies have either "deny-access" or restricted access on their default authorization policy set. 1. Work Centers >> Network Access >> Policy Sets. 2. Choose ">" on the desired policy set. 3. Expand Authorization Policy. On the default authorization rule, select "Deny-Access" or a result that is configured for a restricted VLAN, ACL, SGT, or any combination of these used to restrict the access.